F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust

F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus

F01N3/28—Construction of catalytic reactors

F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration

F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing

F01N3/2857—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite

F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust

F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus

F01N3/28—Construction of catalytic reactors

F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration

F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing

F01N3/2864—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets comprising two or more insulation layers

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE

Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection

Abstract

The invention relates to a catalytic exhaust gas cleaning system (1) and a corresponding compensation layer (4), especially for motor vehicles. The inventive system reliably protects a so-called swelling mat (5) from strongly pulsating streams of exhaust gases, even at very high ambient temperatures. To this end, a compensation layer (4) comprising the swelling mat (5) and an insulating mat (6) is provided between an outer housing (3) and a honeycomb (2). An edging (7) is produced preferably by folding round the insulating mat (6). Said edging (7) is thicker in the area of at least one face of the honeycomb (2) than in the remaining inner area (8) of the insulating mat (6). Next to the side of the inner area (8) facing away from the honeycomb (2), the swelling mat (5) is arranged so that the thicker area of the edging (7) of the insulating mat (6) covers those edge areas of the swelling mat (5) which are at risk of abrasion. The compensation layer (4) preferably consists of a composite material which can be wound. The invention is characterised by its especially simple and effective construction and is also suitable for use in devices within motor vehicle exhaust gas cleaning systems (1) which are situated close to the engine, even when thin-walled-ceramic honeycombs are used.

Ein Nachteil derartiger Quellmatten, wie überhaupt der für solche Fälle bevorzugt eingesetzten Matten auf Aluminium-Silikatläserbasis, besteht aber darin, daß sie durch pulsierende Abgasströme sehr leicht abgetragen werden. A disadvantage of such mats source, such as any of the mats on aluminum Silikatläserbasis preferably used for such cases, however, is that they are very easily removed by pulsating exhaust streams.

Weitere Merkmale, Vorteile und Ausgestaltungen der vorliegenden Erfindung werden in der folgenden Beschreibung anhand der Zeichnung beschrieben. Further features, advantages and embodiments of the present invention are described in the following description with reference to the drawing.Es stellt dar: It shows:

Flexible pipe element for exhaust gas system of passenger car, has film made of three layers and formed as hollow cylinder between flexible inner tube and flexible, gas-tight cladding part, where exhaust gas flows via inner tube

Protective device against bursting turbochargers comprises an endless looped belt of textile fiber material which has a high penetration resistance, and covers at least a part of the turbocharger circumference